Jet exhauster



Oct. 21 1924.

L. F. KOELLNER JET EXHAUSTER Filed June 5, 1922 2 Sheets-Sheet l INVENToR I. LoulE F.Ko|'-:l;LNER f Oct. 21 1924.

L. F. KOELLNER JET EXHAUSTER -Filed June 5, 1983.

D i Hi H J 4 E fa J B K 2 kSheets-Sheet 2 INVENTOR Lou|E'F.Kol-:L|.NER

Patented Oct. 21, 1924.

UNITED STATES LOUIE F. KOELLNERy'OF ST. LOUIS, MISSOURI.

JET' EXnAUsTnR.

Application filed June 5,

fo' all whom t may concern Be it known that l, Loom F. KonLLNnn, of St. Louis, Missouri, have invented a new and useful Jet Exhauster, of which the following is a full, clear, and exact descrip,n tion, reference being had to the accompany ing drawings, forming part of this specification.

This invention relates to jet blowers and exhausters, particularly those whose inlet end forms part'of a pipe conveying the propelled fluid or is contained within such a pipe, and more particularly to Venturi chimneys using high-pressure mot-ive fluid discharged through small nozzles.

TWhen steam is used as the motive fluid, the variation in temperature causes 1nillscale to be detached from the inside of the steam pipe; This scale is carried forward by the steam and frequently lodges in the nozzle where it obstructstlie flow of steam and reduces the efficacy or even stops the operation of the apparatus. Other foreign matter is sometimes carried by the motive fluid and acts in the same manner.

When Venturi chimneys are operated by steam or other motive fluid under high pressure, the nozzles are necessarily small and such clicking is then more apt to occur than with large nozzles discharging low pressure motive fluid. These nozzles are particularly inaccessible, because it is necessary to close the dampers of all flues leading into the chimney to allow of safe entrance to the interior, and during this time the boiler or other furnaces'connected to the chimney are out of operation.

The main object of my invention is to provide a jet blower or exhauster that is equipped with a cleaning device for the nozzle arranged so that it can be operated from a point some distance away from the blower or exhauster, thereby eliminating the necessity of a workman entering the apparatus in which the blower or exhauster is arranged each time the nozzle becomes clogged or obstructed.

To this end I have devised a jet exhauster that is equipped with a small bore pipe or tube, one end of which is coaxial with the nozzle and whose other end is so arranged that a wire or other device can be inserted in same and operated from a point located some distance away from the ex.-

1922. Serial No. 565,951.

hauster to clean the nozzle or remove an obstruction from same.

Figure l is a vertical section of a Venturi chimney constructed in accordance with my invention.

Figure 2 is an enlarged view, similar to Figure l.

Figure 3 is a view of a different type of exhauster constructed in accordance with my invention.

Figure il is a vertical section of a Venturi chimney, illustrating another form of my invention.

Figure 5 is an enlarged view on line @-6 of Figure l-l; and

Figure 6 is an enlarged view of a detail. Vof the apparatus illustrated in Figure Ll.

Referring to Figure-s l and 2 of the drawings which illustrate one form of my invention,'A designates the Venturi chimney, l designates a plain cylindrical chimney, C designates a flue leading into the chimney, D 'designates the steam nozzle, Fi and F designate the steam supply pipe connected by the T G and H and J designate brackets which support the nozzle and steam supply pipino. A bushing l, is screwed into the bottom connection of the nl' Gr and a small bore pipe or tube 2 is screwed into the bushing. The tube 2 is bent so that it projects a little outside of the chimney, and the end is closed by a cap 3, or in any other` well known manner. A portion of said tube il is preferably left straight as indicated at 4.

ll/"lienever the nozzle becomes choked, the steam supply is first shut olf by closing the valve 5. Then the cap 3' is removed and a wire G, indicated by dotted lines, is introduced into the tube 2. This wire is prefer ably of copper or soft brass and rounded at the entering end. lt pas es easily along the bent portion of the tube 2, and the straight portion 4, guides the end of the wire so that it enters the pipe E without catching on the lower end of it. The inside of the nozzle carrier is gradually tapered as at 7 so as to guide the end of the wire smoothly intothe tapered inlet 8 of the nozzle.

rllhe pipe or tube 2 may conveniently be standard 1A; inch pipe whose bore is a littlemore than l@ inch, and the wire 2 may be 1/8 to g inch diameter, more or less.

lin installing the apparatus, the pipe 2, while straight, is screwed into the bushing l.

It is then easily bent and the end passed through a small hole in the Wall of the chimney as shown. lhen the chimney is of brickwork or concrete, its Walls are very thick as compared With the thin steel Wall shown; but there is no ditiiculty in bending the small pipe and passing it through such thick Walls.

As jet exhausters are so easily placed in any position as part of a system of piping t'or such purposes as removing vitiated air or noxious gases, they are frequently placed in inaccessible positions. In Figure 3, a jet exhauster is shown hig'h up in a building and in case oft the nozzle becoming choked it would hitherto have been necessary to use a ladder to attend to it. Vith my invention, the small bore tube 2 is carried down te convenient Position Where the @er 3 een be easily removed and the Wire inserted t0 clear the nozzle by a person standing on the floor. The pipe 2 may be straight or bent as most convenient.

The cap 3 may be replaced by a plug cock or gate valve which can be opened to admit the Wire., and the valve or cock may also be used to drain Water from the steam pipe supplying the nozzle.,V The valve and cock are not illustrated because they are familiar to anyone skilled in pipe litting.

Figure 4 illustrates a modilication Wherein the tube 2 for guiding the Wire is Wholly Within the pipe supplying motive fluid to the nozzle. The characters A, B, D., E, F, H and J designate the same parts as in Figure l. The pieces E and F, of the steam pipe are connected by a 45 elbou7 K, and the piece F is connected to the steam supply pipe M by means of a T L. As in Figure l, the pipe or tube 2, which guides the Wire 6, is provided with a straight part 4, which is coa- Xial With the nozzle. At the end near the nozzle the straight part 4 or the tube 2 is attached to a centering spider 11 illustrated in more detail in Figure 5. In operation, the Wire 6 is absent and the opening 9 of the T L is closed by the plug l() of Figure 6. lVhen it is desired to clear the nozzle the plug l0 is removed and the Wire 6 entered into the lower end of thetube 2 and pushed along and through it and eventually through the nozzle- In multiple jet exhausters a small bore pipe or tube would be combined with each of the nozzles.

All the parts used in the practico of my invention are of Well known standard pipe, pipe iittings and wire, so that it is simple and cheap as well as being eflective and durable.` No claim is made to the use of any of such standard parts except in the combinat-ion described and for the purpose set forth.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A jet exhauster provided with a nozzle, and a small bore pipe or tube arranged inside ot the exhauster with its inner end positioned coaxially with the nozzle and its outer e-nd terminating at a point some distance away freni the exhauster, said tube being adapted to have a wire or the like inserted in same to clean the nozzle.

2. A jet exhauster provided with a nozzle through which a motive fluid is discharged, a pipe for supplying said motive fluid to the nozzle, a tube arranged inside of said pipe With its inner end coaxial with the nozzle and its outer end terminating outside or' said pipe, and a Wire in said tube that is adapted to be actuated to clean said nozzle.

3. A jet eXhauster provided with a nozzle through which a motive fluid is adapted to be discharged, a pipe for supplying said motive fluid to the nozzle, a tube arrangei'l inside ot said pipe with its inner end coaxial with the nozzle and its outer end terminating outside of said pipe, said tube being adapted to receive a device that is used to clean the nozzle, and means for closing the outer end of said tube when said cleaning device is not being used. Y

4. The combination of a Venturi chimney, a steam jet exhauster arranged inside of said chiinney and equipped with a nozzle, and a tube arranged inside of said exhauster with its inner end coaxial With the nozzle and its outer end portion projecting laterally through the chimney, said tube being adapted to have a Wire or the like inserted in same and operated from a point on the outside of the chimney to clean the nozzle.

LOUIE F. KOELLNEB.

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